Compact silicon-based optoelectronicIQ modulatornokuda kwekukurukurirana kwakabatana
Kuwedzera kuri kudiwa kwemazinga epamusoro ekufambiswa kwedata uye mamwe ma transceivers ane simba-anoshanda munzvimbo dzedata zvakafambisa kuvandudzwa kwekompakiti yepamusoro-inoshanda.Optical modulators. Silicon yakavakirwa optoelectronic tekinoroji (SiPh) yave chikuva chinovimbisa chekubatanidza akasiyana mafotonic zvikamu pane imwechete chip, ichigonesa compact uye inodhura-inoshanda mhinduro. Ichi chinyorwa chichaongorora chinyorwa chinotakura chakadzvanyirirwa silicon IQ modulator yakavakirwa paGeSi EAMs, inogona kushanda pamhepo inosvika makumi manomwe neshanu Gbaud.
Dhizaini yedhizaini uye maitiro
Iyo yakatsanangurwa IQ modulator inotora compact matatu ruoko chimiro, sezvakaratidzwa mumufananidzo 1 (a). Inoumbwa neatatu GeSi EAM uye matatu thermo optical phase shifters, achitora symmetrical kumisikidza. Chiedza chekupinza chinosanganiswa mu chip kuburikidza ne grating coupler (GC) uye yakaenzana yakakamurwa kuva nzira nhatu kuburikidza ne1 × 3 multimode interferometer (MMI). Mushure mekupfuura nemodulator uye phase shifter, mwenje unosanganiswa neimwe 1 × 3 MMI uye wozobatanidzwa kune imwe-modhi fiber (SSMF).
Mufananidzo 1: (a) Microscopic mufananidzo weIQ modulator; (b) – (d) EO S21, extinction ratio spectrum, uye transmittance yeGeSi EAM imwe chete; (e) Schematic dhizaini yeIQ modulator uye inoenderana optical chikamu chechikamu chinochinja; (f) Mutakuri anodzvinyirira anomiririra pane yakaoma ndege. Sezvinoratidzwa mumufananidzo 1 (b), GeSi EAM ine yakakura electro-optic bandwidth. Mufananidzo 1 (b) yakayera iyo S21 paramende yeimwe GeSi EAM bvunzo chimiro uchishandisa 67 GHz optical component analyzer (LCA). Zvifananidzo 1 (c) uye 1 (d) zvakatevedzana zvinoratidzira iyo static extinction ratio (ER) spectra pamagetsi akasiyana eDC uye kutapurirana pawavelength ye1555 nanometers.
Sezvinoratidzwa muMufananidzo 1 (e), chinhu chikuru chekugadzirwa uku ndiko kukwanisa kudzvinyirira vatakuri vemaziso kuburikidza nekugadzirisa kusanganiswa kwechikamu chepakati mukati meruoko. Musiyano wechikamu pakati pemaoko ekumusoro neazasi ndi π/2, inoshandiswa kugadzirisa zvakaomarara, ukuwo musiyano wechikamu pakati peruoko rwepakati -3 π/4. Ichi chigadziro chinobvumira kukanganisa kunoparadza kune mutakuri, sezvinoratidzwa mundege yakaoma yeMufananidzo 1 (f).
Experimental setup nemigumisiro
Iyo yepamusoro-yekukurumidza yekumisikidza setup inoratidzwa muMufananidzo 2 (a). Anopokana waveform jenareta (Keysight M8194A) inoshandiswa sechiratidzo sosi, uye maviri 60 GHz chikamu chakafanana neRF amplifiers (ane akasanganiswa bias tees) anoshandiswa se modulator madhiraivha. Iyo bias voltage yeGeSi EAM ndeye -2.5 V, uye chikamu chinofananidzwa neRF tambo inoshandiswa kudzikisa kusawirirana kwechikamu chemagetsi pakati peI neQ chiteshi.
Mufananidzo 2: (a) High speed experimental setup, (b) Carrier kudzvinyirirwa pa70 Gbaud, (c) Kukanganisa kwehuwandu uye data data, (d) Constellation pa70 Gbaud. Shandisa yekutengeserana yekunze cavity laser (ECL) ine linewidth ye100 kHz, wavelength ye1555 nm, uye simba re12 dBm semutakuri wemaziso. Mushure modulation, chiratidzo chemaziso chinokwidziridzwa uchishandisa anerbium-doped fiber amplifier(EDFA) kutsiva kurasikirwa kwe-on-chip coupling uye kurasikirwa kwekuisa modulator.
Pakupera kwekugamuchira, Optical Spectrum Analyzer (OSA) inotarisa chiratidzo chechiratidzo uye kudzvinyirira kwemutakuri, sezvinoratidzwa mumufananidzo 2 (b) ye70 Gbaud chiratidzo. Shandisa mbiri mbiri polarization inoenderana inogamuchira kugamuchira masaini, ayo ane 90 degree optical mixer uye ina.40 GHz yakaenzana mafotodiode, uye yakabatana ne33 GHz, 80 GSa/s real-time oscilloscope (RTO) (Keysight DSOZ634A). Yechipiri ECL sosi ine mutsara we 100 kHz inoshandiswa senzvimbo oscillator (LO). Nekuda kweiyo transmitter inoshanda pasi peimwe polarization mamiriro, maviri chete emagetsi chiteshi anoshandiswa analog-to-digital shanduko (ADC). Iyo data inorekodhwa paRTO uye inogadziriswa ichishandisa isina dhijitari chiratidzo processor (DSP).
Sezvakaratidzwa muMufananidzo 2 (c), IQ modulator yakaedzwa uchishandisa QPSK modulation format kubva ku40 Gbaud kusvika ku75 Gbaud. Zvigumisiro zvinoratidza kuti pasi pe7% yakaoma sarudzo mberi kwekugadzirisa kukanganisa (HD-FEC) mamiriro ezvinhu, chiyero chinogona kusvika ku140 Gb / s; Pasi pemamiriro e20% yakapfava sarudzo yepamberi yekururamisa kukanganisa (SD-FEC), iyo yekumhanyisa inogona kusvika 150 Gb / s. Iyo dhizaini yenyeredzi pa70 Gbaud inoratidzwa muMufananidzo 2 (d). Mhedzisiro yacho inogumira neiyo oscilloscope bandwidth ye33 GHz, iyo yakaenzana neiyo chiratidzo bandwidth inosvika 66 Gbaud.
Sezvinoratidzwa muMufananidzo 2 (b), chimiro chemaoko matatu chinogona kudzvanya zvinotakura zvinotakura nechiyero chisina chinhu chinodarika makumi matatu dB. Ichi chimiro hachidi kudzvinyirirwa kwakakwana kwemutakuri uye chinogona zvakare kushandiswa kune vanogamuchira vanoda toni dzekutakura kuti dzidzore zviratidzo, senge Kramer Kronig (KK) vanogamuchira. Iyo inotakura inogona kugadziridzwa kuburikidza nepakati ruoko chikamu shifter kuti uwane inodiwa inotakura kune sideband ratio (CSR).
Zvakanakira uye Zvishandiso
Kuenzaniswa neyechinyakare Mach Zehnder modulators (MZM modulators) uye mamwe silicon-based optoelectronic IQ modulators, iyo yakatsanangurwa silicon IQ modulator ine akawanda mabhenefiti. Chekutanga, iri compact muhukuru, kanopfuura kagumi idiki pane IQ modulators zvichienderanaMach Zehnder modulators(kusingabatanidzi bonding pads), nokudaro kuwedzera kusanganisa density uye kuderedza chip nzvimbo. Chechipiri, iyo yakaturikidzana electrode dhizaini haidi kushandiswa kwematerminal resistors, nekudaro kuderedza mudziyo capacitance uye simba pabhiti. Yetatu, iyo inotakura kudzvinyirira kugona kunowedzera kudzikisira kwesimba rekutapurirana, zvichiwedzera kuvandudza kushanda kwesimba.
Pamusoro pezvo, iyo optical bandwidth yeGeSi EAM yakakura kwazvo (inopfuura makumi matatu nanometers), ichibvisa kudiwa kweakawanda-channel mhinduro yekudzora maseketi uye processors kudzikamisa uye kuwiriranisa resonance yemicrowave modulators (MRMs), nekudaro kurerutsa dhizaini.
Iyi compact uye inoshanda IQ modulator yakanyatsokodzera chizvarwa chinotevera, yakakwira chiteshi kuverenga, uye madiki anowirirana transceivers munzvimbo dze data, zvichiita kuti hukuru hwepamusoro uye huzhinji-hunoshanda hwemagetsi kutaurirana.
Mutakuri akadzvanya silicon IQ modulator inoratidza kuita kwakanakisa, ine mwero wekutumira data unosvika 150 Gb/s pasi pe20% SD-FEC mamiriro. Yayo compact 3-ruoko chimiro chakavakirwa paGeSi EAM ine zvakakosha zvakakosha maererano netsoka, kushanda nesimba, uye dhizaini iri nyore. Iyi modulator inokwanisa kudzvinyirira kana kugadzirisa optical carrier uye inogona kusanganiswa nekuona kwakabatana uye Kramer Kronig (KK) zvirongwa zvekuona zvemazhinji mitsara compact coherent transceivers. Izvo zvakaratidzwa zvakabudirira zvinofambisa kuzadzikiswa kweakanyanya kubatanidzwa uye anobudirira optical transceivers kuti asangane nekukura kuri kuita kwepamusoro-kugona data kutaurirana munzvimbo dzedata uye mamwe minda.
Nguva yekutumira: Jan-21-2025